![]() edulis restoration projects have been set up in the North Sea, off the coast of the Netherlands (e.g. This may therefore be the ideal time to attempt to restore flat oyster reefs. However, the flat oyster population in the Dutch Delta area is showing signs of recovery, particularly in Lake Grevelingen (Smaal, Kamermans, Van der Have, Engelsma, & Sas, 2015). edulis has declined considerably due to increased mortality as a result of overfishing around the end of the 19 th and beginning of the 20 th centuries (Gercken & Schmidt, 2014) and more recently due to the parasite Bonamia ostreae (Engelsma et al., 2010). The flat oyster not only acted as a keystone species for a rich and productive ecosystem, but also served as an economically profitable fisheries product (Gercken & Schmidt, 2014). ![]() The European flat oyster ( Ostrea edulis), was once widespread in the southern North Sea (Olsen, 1883). edulis spat collectors intended for reef restoration purposes but may need further development for cultivation application. Suspended sacks of bivalve shells show great promise as O. Fouling was heavy and may have prevented larval settlement on collectors deployed too early.In general, most spat were observed on collectors deployed 1–2 weeks after the peak in larval abundance was detected.The most successful spat collectors were sacks of bivalve shells.edulis and the non-indigenous Pacific oyster ( Crassostrea gigas) varied between locations and years. Larval abundance, and timing of peaks in abundance for both O.These different types included Chinese hats, Vexar mesh, PVC tubes, and four types of bivalve shells. The results of four different experiments investigating larval abundance, and the use of seven different types of suspended spat collectors in seven locations in the SW Netherlands were compared.Efficient spat collection is essential to both the successful restoration and cultivation of the European flat oyster ( Ostrea edulis).* If delivery of seed is scheduled, and grower cancels delivery less than 24 hours before delivery, a restocking fee of 10% of the total value of the sale will be charged to the grower. Payments are made by credit card or money order to Hoopers Island Oyster Co. From April through September, we are able to fill some orders immediately depending on quantity and your choice in size and strain. Most orders are filled within 30 days of preferred delivery date. Orders are filled in the order in which deposits are received. We must be notified within 72 hours after receipt of order to assist with count and viability disputes. HIOC will not be held responsible for the condition of shipments after they leave our possession. All shipments will be insured for the value of seed being shipped. Orders requiring overnight shipping will have shipping costs added to an additional invoice. For quantities less than 10,000, please visit our gardener page. Pricing listed below is for orders of 10,000 pieces or more. ![]() ![]() All sales must be Paid in Full before product will be released. We require a 25% non-refundable deposit at the time of order. ![]() Contact us to inquire about seed larger than 8mm. Cultchless SeedĬultchless seed can be purchased in 5 sizes: 1, 2, 4, 6, 8, (options based on the screen size on which they retain actual shell size is larger). Availability varies between April and November. Our eyed larvae have a setting rate of 15 to 20% with an average of 18 to 20%. ![]()
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